Apparatus for operating the impression-latches of platen printing or embossing machines.



No. 725,508. PATENTED APR, 14, 1908 P. W. THOMAS. I APPARATUS FOR OPERATING THE I-MPRBSSION LATGHES 0F PLATEN PRINTING 0R EMBOSSING MACHINES.

APPLICATION IILED 001'. 27, 1902. N0 MODEL. 2 SHEETS-SHEET 1.

nvzutoz W. THOMAS, PATENTED APR. 14, I909. APPARATUS FOR OPERATING THE IMPRESSION LATGHES 0P PLATE PRINTING 0R BMBYOYSSING MACHINES. v

y APPLICATION FILED 0OT.27, 1002. no MODEL.

2 SHEETS-SHEET 2.

I w M I mm NITLED. S

'ATENT EErcE.

FRANK WILLARD ?THOMAS, OE TOLEDO, OHIO, ASSIGNOR To JOHN THOMSON PRESS COMPANY, OF NEW YORK, N. Y., A CORPORATION OF NEW JERSEY.

APPARATUS FOR OPERATING THE IMPRESSION-LATCHES OF PLATEN PRINTiNG R EMBOSSING MACHINES.

SPECIFICATION forming part of Letters Patent No. 725,508, dated April 14, 1903.

Applicationifiled October 27,1902. Serial No. 129,037. '(No motleL 7 To all whom it may concern:

"Be it known that I, FRANK WILLARD THOMAS, a citizen of the United States, residing at Toledo, in the eou'nty'of Lucas and State of Ohio, have invented certain new and usefullmprovements in Apparatus for Operatin g the Impression-Latches of PlatenPrinting or Embossing Presses, of which the following is a specification.

This invention refers in general to platen printing or embossing presses; and the particular object is to provide means for the positive and convenient operation of the latches that look the adj uster-bar and its eccentric impression-sleeves to the platens of platen printing or embossing presses, such as those known to the art by the trade-names of the Oolts Armory and the Universal.

In the drawings, Figure l is -a side elevation of a press,denoting' au'embodiment of the invention. Fig. 2 is an enlarged top plan detail view. Fig. 3 is a front elevation developed from Fig. 2, and Fig. 4 is an end elevation and section developed from Fig. 3.

The several parts well known to those skilled in the art may first-be briefly noted. 5 is the platen; 6, the platen-shaft; 7, the eccentric impression 0r throw-off sleeves; 8, the adjusterbar; 9, the adjuster latch or latches, and the adjuster slide or slides attached to the platen in a manner to be shifted back or forth'to determine the position of the face of the platen with respect to the form due to the eccentricity of the sleeves.

The adjuster-latch shaft 12 operates in a vertical bearing 13 in the adjuster-bar 8, and in the recess 14: is a spring 15, whose thrust is exerted between the head 16 of the recess and a shoulder 17 of the latch-shaft-that is, by this means the latch 9 is snapped and held into engagement with the slot 18 of the adjuster-slide l0.

Heretofore where a single latch has been deemed sufficient a knob has been attached to the extremity of the latch-shaft 12 to be grasped by the pressman for throwing off or. tripping the impression; but where two latches were employed their shafts have been connected by a hand-rod, so that both latches present invention obviates these objections by applying to theprojecting'end or ends of the latch-shaft 12, as by a pin 20, a lever 21, the forward end 22 of which acts as a cam I upon the surface 23 of the adjuster-bar 8. The inner portion, as 24, may serve as a handle, or if two latches are used the lovers are connected by a hand-rod, as 25. It will now be seen that by a proper 'proportionment of the leverage and formation of the cam 22, so that the leverage will be in favor of the operator, the latches 9 may be raised againstthe springs very easily and with the utmost speed and certainty by simply swinging the lever 21 or both levers by the hand-rod 25 in the arc of a curve, as to the position indicated by the dotted outline 26. By this arrangement the springs may be made of ample power whereby to secure the latches in the most effective manner, and when two latchesare used the hand-rod may be grasped and operated effectively at any location between the latch-levers.

It is to be noted that the position of the lever may be reversed-that is, be swung over to the opposite side of the vertical center of the .latch-shaft-also that by flattening the lever, as at the location '22, Fig. 4,- the latch may be locked up until the lever is actuated.

Without limiting myself to the'pre cise arrangement and construction denoted in the drawings, What I claim as my invention, and desire to secure by Letters Patent, is

In a platen printing or embossing press, the combination with an impression adjusting sleeve, of an adj uster-bar attached to the adjusting-sleeve, an adjuster latch and spring mounted in the bar, and a lever connected to the latch, the shorter end of said lever adapt- In testimony whereof I have signed my ed to thrust against the adjuster-bar and its name to this specification in the presence of long end being adapted for manual operation, two subscribing, witnesses.

the arrangement and construction being such FRANK WILLARD THOMAS. that raising the lever disconnects the latch Witnesses:

and swings the adjuster-bar, substantially as JOHN R. CALDER,

described. W. H. ROOSE. 

